On Thursday, April 4, 2013 5:44:40 AM UTC-5, carlo montanari wrote:
>
> Hi all,
>
> if I define a file resource without specifying an ensure parameter, it
> seems to behave like ensure => present was specified.
>
Yes, that's the default.
> I'm trying to require a file only when a command is executed, using
> something like this:
>
> file{'myfile':
> path => '/tmp/myfile',
> source => "puppet:///modules/myexample/myfile",
> }
>
> exec { "myexec":
> command => "/usr/local/bin/do_something -f /tmp/myfile",
> onlyif => "/usr/local/bin/mytest",
> require => [
> File["myfile"],
> ];
> }
>
> but it always creates myfile, regardless to mytest.
>
Yes, it's a managed file. The require just directs Puppet to apply it
before attempting to apply the Exec.
Is there a way to bind the creation to the onlyif test?
>
>
It depends.
Puppet will not apply one resource in the middle of applying a different
one. Specifically, it will not under any circumstances apply a File
between evaluating the Exec's 'onlyif' test and running its command.
If the file can be applied conditionally on success of the whole Exec then
just making the File 'require' the Exec should do the trick. There's an
important caveat here, however: the overall Exec succeeds (without running
the command) when the onlyif test fails, so that probably doesn't achieve
what you want.
The best you can do might be to turn the onlyif test into a custom fact.
That will cause it to run much earlier (before any resources are applied),
and it will make the result available in your manifests, so that you can
declare both the File and Exec only if the test succeeded.
John
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